08-04-2026 20:33
Vasileios Kaounas
Found 07-04-26, in Abies cephalonica. Diameter 1,
08-04-2026 10:39
FRANCIS FOUCHIERBonjour , je recherche en pdf cet article: KORF R
06-04-2026 21:36
Viktorie Halasu
Hello, could anyone please send me the article wi
06-04-2026 19:40
David Gibbs
Help with this one much appreciated, on rotting Fa
06-04-2026 11:07
Louis DENYBonjour forum, Trouvé sur bois de feuillu très d
06-04-2026 16:24
Juuso ÄikäsLast Tuesday I found some tiny white Helotiales gr
Pyreno on Fraxinus excelsior.
Per Marstad,
16-03-2019 18:39
I found this to-day, in Norway.On the bark of Fraxinus, small, ca 1 mm.
Konidia 25 - 28 x 12 my.
It is nice with a name.
Per.
Chris Yeates,
16-03-2019 18:50
Re : Pyreno on Fraxinus excelsior.
Viktorie Halasu,
16-03-2019 21:20
Re : Pyreno on Fraxinus excelsior.
Dear Chris,
I'd like to ask, what's the difference between Macrophoma fraxini and Diplodia fraxini (or rather D. mutila, without brown conidia)?
Thank you in advance.
Viktorie
https://www.researchgate.net/publication/260591572_The_complex_of_Diplodia_species_associated_with_Fraxinus_and_some_other_woody_hosts_in_Italy_and_Portugal
I'd like to ask, what's the difference between Macrophoma fraxini and Diplodia fraxini (or rather D. mutila, without brown conidia)?
Thank you in advance.
Viktorie
https://www.researchgate.net/publication/260591572_The_complex_of_Diplodia_species_associated_with_Fraxinus_and_some_other_woody_hosts_in_Italy_and_Portugal
Chris Yeates,
16-03-2019 21:29
Re : Pyreno on Fraxinus excelsior.
They may represent the same thing as far as I know. "Coelomycetes" can be a taxonomic minefield, crying out for more molecular work.
Viktorie Halasu,
16-03-2019 21:39
Re : Pyreno on Fraxinus excelsior.
Yes, there's also a paper "Relationship of Macrophoma and Diplodia" (1904) by J.T.Emerson who obtained both types of conidia from a single pycnidium. That's why I was asking, to see if there's a molecular work on them.
By the way, my collections identified as Diplodia (fraxini or mutila, I'm still not sure how to distinguish them without dark brown conidia abundantly present) released a pigment into water or KOH mount, hyaline in visible light, but bluegreen in UV 365 nm. (The dark blue background is an artifact, I probably forgot to use UV filter.)
Correction: the UV+ water-soluble pigment it's actually not from the fungus, but from upper layer of Fraxinus bark. :-/ Sorry for not checking that before.
By the way, my collections identified as Diplodia (fraxini or mutila, I'm still not sure how to distinguish them without dark brown conidia abundantly present) released a pigment into water or KOH mount, hyaline in visible light, but bluegreen in UV 365 nm. (The dark blue background is an artifact, I probably forgot to use UV filter.)
Correction: the UV+ water-soluble pigment it's actually not from the fungus, but from upper layer of Fraxinus bark. :-/ Sorry for not checking that before.
